Hi Charles, Back some 33 years ago, my first full-time job after graduating from university was with a small hydro-electric components manufacturing firm in Toronto, called "Trench Electric."
One of their specialty items was the manufacture of wave traps, used when coupling VLF RF signals into the multi-kilovolt high-tension power lines that traverse the country. Seems hydo companies used RF signal devices travelling directly through their "right of ways" to trigger remote control devices along their system...they even communicated orally (or at least, they USED to, back then) via SSB. Our company never manufactured the RF generating devices, just the wave traps. As I recall, the SSB generators were rated at around the 100-watts level. The idea was NOT to actually radiate from the HV lines, per se, but rather to travel directly on them, from point A to point B. I thought that was a marvelously original concept, until such time as I saw Hams pulling off more or less the exact same stunt, in specific WW2 era issues of QST magazine...Radio Amateurs pre-dated the Trench stuff by some 30+ years! Hi Hi. ~73~ Eddy VE3CUI - VE3XZ ***************************************** ----- Original Message ----- From: "charles whitesmith" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, April 13, 2008 12:56 PM Subject: [AMRadio] carrier current transmissions > > Interesting info on Powerline transmissions by Utility companies,I was CE at Ole Miss college station WCBH in 60's using carrier currrent and we ran pair of 814's into coax which fed individual coupling units for each building feeding the 220 vac entrance line .The buildings leaked radiated signal which was adequate to receive on car radios all over campus.FCC engineers seemed to like our operation as never wrote us a ticket.We were on the air during the somewhat famous integration riots in which we had a sniper firing from a hide on our roof,and a French newsman asassinated just outside our doorsteps. > > I have often wondered if it would be feasible to utilize long HV electricic transmission lines as radiating horizontal "long wire" antennas for medium or even high power commercial AM band broadcasting.Must be experimental data on this somewhere. 73, C.W > > _________________________________________________________________ > Get in touch in an instant. Get Windows Live Messenger now. > http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh_getintouch_042008______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > To unsubscribe, send an email to [EMAIL PROTECTED] with > the word unsubscribe in the message body. ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
